/*
 * ==========================================================================================
 * =                   JAHIA'S DUAL LICENSING - IMPORTANT INFORMATION                       =
 * ==========================================================================================
 *
 *                                 http://www.jahia.com
 *
 *     Copyright (C) 2002-2020 Jahia Solutions Group SA. All rights reserved.
 *
 *     THIS FILE IS AVAILABLE UNDER TWO DIFFERENT LICENSES:
 *     1/GPL OR 2/JSEL
 *
 *     1/ GPL
 *     ==================================================================================
 *
 *     IF YOU DECIDE TO CHOOSE THE GPL LICENSE, YOU MUST COMPLY WITH THE FOLLOWING TERMS:
 *
 *     This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 *
 *     2/ JSEL - Commercial and Supported Versions of the program
 *     ===================================================================================
 *
 *     IF YOU DECIDE TO CHOOSE THE JSEL LICENSE, YOU MUST COMPLY WITH THE FOLLOWING TERMS:
 *
 *     Alternatively, commercial and supported versions of the program - also known as
 *     Enterprise Distributions - must be used in accordance with the terms and conditions
 *     contained in a separate written agreement between you and Jahia Solutions Group SA.
 *
 *     If you are unsure which license is appropriate for your use,
 *     please contact the sales department at sales@jahia.com.
 */
package org.jahia.ajax.gwt.client.widget.toolbar.action;

import com.extjs.gxt.ui.client.widget.Info;

import org.jahia.ajax.gwt.client.core.BaseAsyncCallback;
import org.jahia.ajax.gwt.client.data.toolbar.GWTJahiaToolbarItem;
import org.jahia.ajax.gwt.client.messages.Messages;
import org.jahia.ajax.gwt.client.service.content.JahiaContentManagementService;
import org.jahia.ajax.gwt.client.widget.Linker;
import org.jahia.ajax.gwt.client.widget.poller.Poller;
import org.jahia.ajax.gwt.client.widget.poller.TaskEvent;

/**
 * 
 * User: ktlili
 * Date: Jan 20, 2010
 * Time: 1:51:18 PM
 */
@SuppressWarnings("serial")
public class NumberOfTasksWorkflowMenuActionItem extends BaseActionItem implements Poller.PollListener<TaskEvent> {

    private Integer numberOfTasks = null;
    private boolean displayWorkflowCounter;

    public void init(final GWTJahiaToolbarItem gwtToolbarItem, final Linker linker) {
        super.init(gwtToolbarItem, linker);
        if (displayWorkflowCounter) {
            JahiaContentManagementService.App.getInstance().getNumberOfTasksForUser(new BaseAsyncCallback<Integer>() {
                public void onSuccess(Integer result) {
                    numberOfTasks = result;
                    updateLabel(result);
                }
            });
            Poller.getInstance().registerListener(this, TaskEvent.class);
        }
    }

    public void handlePollingResult(TaskEvent result) {
        if (result.getNewTask() != null) {
            Info.display(Messages.get("label.tasks.new", "You have a new task to do"), result.getNewTask());
            if (numberOfTasks != null) {
                numberOfTasks++;
                updateLabel(numberOfTasks);
            }
        }
        if (result.getEndedTask() != null) {
            if (numberOfTasks != null && numberOfTasks > 0) {
                numberOfTasks--;
                updateLabel(numberOfTasks);
            }
        }
        if (result.getEndedWorkflow() != null) {
            Info.display(Messages.get("label.workflow.ended", "A workflow has ended"), result.getEndedWorkflow());
        }
    }

    private void updateLabel(Integer nb) {
        numberOfTasks = nb;
        if (nb == 0) {
            updateTitle(Messages.get("label.numberoftasksforuser.notasks", "No Waiting tasks"));
        } else {
            updateTitle(getGwtToolbarItem().getTitle() + " (" + nb + ")");
        }
    }

    /**
     * Called when there is a new liker selection. Override this method to provide custom behaviour
     */
    @Override
    public void handleNewLinkerSelection() {
        setEnabled(false);
    }

    public boolean isDisplayWorkflowCounter() {
        return displayWorkflowCounter;
    }

    public void setDisplayWorkflowCounter(boolean displayWorkflowCounter) {
        this.displayWorkflowCounter = displayWorkflowCounter;
    }
}
